package DynamicAgent;

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;

/**
 * @Author Big_white
 * @Date 2021/11/13
 */
public class ProxyFactory {
    //维护一个目标对象
    private Object target;

    //构建构造器时，对target进行初始化
    public ProxyFactory(Object target) {
        this.target = target;
    }

    //给目标对象 生成一个代理对象
    public Object getProxyInstance(){
        return Proxy.newProxyInstance(target.getClass().getClassLoader(), target.getClass().getInterfaces(), new InvocationHandler() {
            @Override
            public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
                System.out.println("JDK代理开始----");
                //反射机制调用目标对象的方法
                Object returnVal = method.invoke(target, args);
                System.out.println("JDK代理提交.....");
                return returnVal;
            }
        });
    }
}
